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Handle a potential race in the notifier when calling get_events_for which resulted in an uncaught KeyError

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This commit is contained in:
Erik Johnston 2014-08-13 17:13:26 +01:00
parent 6904952ec4
commit 6df83555cc
1 changed files with 7 additions and 3 deletions
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10
synapse/api/notifier.py
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@ -166,9 +166,13 @@ class Notifier(object):
"""
logger.debug("%s is listening for events.", user_id)
if len(self.stored_event_listeners[user_id][stream_id]["chunk"]) > 0:
logger.debug("%s returning existing chunk.", user_id)
return self.stored_event_listeners[user_id][stream_id]
try:
streams = self.stored_event_listeners[user_id][stream_id]["chunk"]
if streams:
logger.debug("%s returning existing chunk.", user_id)
return streams
except KeyError:
return None
reactor.callLater(
(timeout / 1000.0), self._timeout, user_id, stream_id